Kindaichi Shounen no Jikenbo EP14 - Isle of Sadness Murder Case File 2

Chris Einstein invites Hajime into investigate the black torii gateway where Hajime is injured after walking near a geyser. While being treated for his wounds, Hajime discovers that Mimasaka's daughter Midori was not favored by her father and she resented him. He also sees a photograph taken ten years earlier of the owners of the island which includes most of the treasure hunters including Professor Saeki and his young son Koichiro. After Saeki appeared to have died accidentally, everyone left the island to Mimasaka and departed. That night, Ryuzo Yasojima is killed when his lodge burns down. All guests have alibis except Kohei Himura, but he is shot a short while later after witnessing the true culprit. While at the onsen, Hajime finds a clue when he discovers that the red ochre on the island turns black on contact with water.